WWYD ? I need to travel cross country by air. I'm taking a couple of guitars. One will be my ES-335. It's a RI from '97, so it's not super valuable but I can't afford to have it damaged. Will it survive being checked with baggage in it's factory hardshell case? I'll detune the strings and add extra cushion and support for the headstock. I really cannot afford an anvil flight case for it. What are the limits of the airlines responsibilities? Any ideas, tips or experiences ?